Costco is a warehouse chain that racks up $88 billion in annual sales. Go behind the scenes and talk to the CEO of the company to find out how he made his deep-discount warehouse idea such a success.

Trending topic: One World Trade Center

Today, the new One World Trade Center –– the building that is replacing the twin towers that were destroyed in the 9/11 attacks –– became the tallest building in New York. Workers erected the first column of the building's 100th floor this morning, making it a little more than 1,250 feet high, according to CBSNews.com.